Trimethyl-cyclohexenoncarboxylic-acid ester and process of making same.



UNITED V STATES Patented November 3, 1903.

PATENT OFFICE.

GEORG MERLING, OF FRANKFORT-ON-THE-MAIN, AND ROBERT WELDE, OF

HooHsT-oN-THE-MAIN, GERMANY,

ASSIGNORS TO FARBWERKE, VORM.

MEISTER, LUOIUS & BRl lNING, OF HOOHST-ON-THE-MAIN, GERMANY, A

CORPORATION OF GERMANY.

SPECIFICATION forming part of Letters Patent No. 743,305, dated November 3,1903.

Application filed April .6, 1903. Serial No. 151,389. (Specimena) To all whom it may concern:

Be it known that we, GEORG MERLING, Ph.D., professor of chemistry, residing at Frankfort-on-the-Main,and ROBERT WELDE, Ph.D., residing at Hochst-on-the-Main, Germany, citizens of the Empire of Germany, have invented certain new and useful Improvements in the Manufacture of Trimethyl Example: Twenty-three parts, by weight, of sodium are dissolved in two hundred and fifty parts of absolute alcohol, one hundred and thirty parts of ethylic acetoacetate being added. When cold, the mixture is treated with one hundred and seventy parts of isopropylidene ethylic acetoacetate and then allowed to stand for several weeks at a low 7 temperature, whereupon sodium ethyl car- Cyclohexenoncarboxylic-Acid Ester, of which the following is a specification.

We have found that sodium ethylic acetoacetate may be condensed with isopropylidene ethylic acetoacetate to trimethyl-cyclohexenoncarboXylic-acid esteraccording to the equation:

GEORG MERLING. ROBERT WELDE.

Witnesses:

ALFRED BRISBOIS, BERNH. LEYDECKER. 

